Why didn t I think of that genius idea? This is the remarkable, at times funny, story of a young entrepreneur who, aged 18 and with 4,000 and no other funding, started up invisibobble the revolutionary hair ties that have taken the haircare industry by storm. Today, Sophie Trelles-Tvede s company has sold over 100 million hair ties around the world and turns over 15 million. As a first-year university student, getting ready for a party, Sophie spotted an old telephone cord and decided to use it to tie her hair with. The next morning, she noticed something different with her hair: she did not have a headache after untying the cord and there was not much of a mark (or kink) in her hair. The genius idea of invisibobble was born right there! This is the story of the idea and thereafter the ups and downs, funny and serious moments, of an entrepreneur s journey that will inspire others and reveal what it takes to succeed.